I occasionally check down at the keyboard, almost out of habit. I don't need to look down at it or anything, but I do type noticeably faster when I do. I am not a slow typer by any means, but it goes much quicker when I look down. I honestly don't even really watch to see if I'm pressing the right buttons. I personally think its more entertaining watching my hands move around than seeing my words pop up on the screen. But its a PITA to go back and fix even just one typo, so I usually don't.